Improvement in machines for bending rake-teeth and other articles



JAMES SUGDEN & E. J. SUGDEN. "Improvement in Machines for Bending RakeTeeth and other Articles. N0. 124,863. Patented March19,1872.

Hal/

FIG5

Wzl'22esses Invenfom.

16mm 3 z, w; aim/M JAMES SUGDEN AND EDMONDS J. SUGDEN, OF PITTSBURG,PENNSYLVANIA.

IMPROVEMENT lN MACHINES FOR BENDlNG RAKE-TEETH AND OTHER ARTICLES.

Specification forming part of Letters Patent No. 124,863, dated March19, 1872.

SPECIFICATION.

To all whom it may concern:

Be it known that we, JAMES SUGDEN and EDMONDS J SUenEN, of Pittsburg, inthe county of Allegheny and State of Pennsylvania, have invented a newand useful Improved Machine for Bending Metallic Rods or Bars; and we dohereby declare the following to be afull, clear, and exact descriptionthereof, reference being had to the accompanying drawing forming part ofthis specification, in which- Figure 1 is a front elevation of ourimproved rod-bending machine. Fig. 2 is an end view of the same, showinga spring gauge Fig. 3 is a view of a double bending-die, showing indotted lines the blank bent thereon; Fig. 4 is a view of a gauging-pin.Fig. 5 shows a bending-die; and Fig. 6, a blank after being bent.

Like letters of reference indicate likeparts in each.

Our invention consists in the construction of an improved machine forbending metallic rodsbr bars toany desired angle; and its advantagesconsist in its simplicity of construction, and the ease and rapidity ofits operation. We especially design our invention for use in bending thebutt-ends of rake-teeth, although it may be used for bending rods orbars, and for many other uses.

To enable others skilled in the art to make and use our invention, wewill describe its construction and mode of operation.

The operative parts of our machine are secured to an upright plate, A,fastened to an upright standard or posts At one side and standingflushwith the front end of the plate A is the bench or table B, upon whichthe rod is laid preparatory to being bent. This table is secured to theplate A by the bolt B projecting through a slotin the lower partof thetable, and is adjustable vertically by means of the set-screw 0. Back ofthis table B is a former or die, D, against which the rod is bent bymeans of the jawE on the end of the lever F, which pivoted or hung at F,describes the are of a circle, shown by the dotted lines, bringing thejaw E from a position parallel to the table B, to the position shown bydotted lines in Fig. 1, directly against the face of the die D. Saiddies are raised or lowered by means of a set-screw, D so as to suit thedifferent-sized rods or blanks to be bent. For bending round rods thedies should be grooved to suit the different sizes. The rod when placedon the table B is held in place by means of the corrugated jaw or holderG, which is hinged at G, and is operated by the cam-shaped lever H.WVhen relieved from the pressure, the camshaped lever H and thecorrugated jaw G are drawn back by means of the springs I and I, so asto release the rod. Back of the table B and directly in the path of therod which is to be bent is a gauge, K, against which the rod is placedbefore it is seized by the jaw G, and which is for the purpose ofgauging the rods, so that they may all be bent to the same length. Thegauge K works through the plate Afrom the opposite side. When at rest itstands flush with the face of the plate. On the opposite side it isattached to the bent lever L which is pivoted to the cleat M. The handleof the lever L projects through under the plate A to the front side.When the gauge Kis needed, it is made to project from the side of theplate the lever is released, the gauge K is thrown back by the spiralspring N. Instead of the gauge K a pin-may be inserted in graduatedholes in the path of the rod.

The operation of our machine is as follows: The blank or rod is put onthe table B and pushed back until it comes against the gauge K, which isdrawn forward by means of the lever L. The lever H is then drawn downcausing the corrugated jaw Gr to seize and hold is then allowed to drawback, and the lever F is drawn down causing the jaw E to bend the rodagainst the die D. The lever H is let go, thereby releasing the rod fromthe bite of the jaw G and the rod is removed. The die D may and may bechanged at pleasure by unscrewing the bolt D. In Fig. 5 we have shown adie, D, whose bending face when attached to the machine, will stand atan angle of about forty-five degrees to the line of the unbent rod. Asthe bending-edge of the jawE wears away we insert therein a removableedge or die, 0. In case it is desired to bend a rod twice to make theblank shown in Fig. 3, we make use of the die shown in Fig. 3. After therod has been bent once, as described, it is pushed along T FFICE.

A by drawing forward the lever L. As soon asthe rod while it is beingbent. The gauge K i be of any angle from one up to ninety degrees,

the table until it comes against the gauge a second time and is bent inthe same way, the part which was first bent entering the cutaway part 1)of the die D. A gauge may be made by inserting a suitably-shaped tool,31, in the graduated holes R on the jaw E. By means of the set-screw Tand ways U, the gauge may be forced toward or from the table B, so as togauge the rod to any desired length.

By our improvement we are enabled to effeet a great saving in themanufacture of raketeeth and other like articles, and to do awayentirely with the necessity of skilled labor.

What we claim as our invention, and desire to secure by Letters Patent,is-

1. \Ve claim, jointly, the bending -jaw E, cl am pin g-j aw G, and theseries of interchangeable dies D, substantially as set forth,

Witnesses Gnonen NEUBERT, JAMES l. KAY.

